Source For Jam Nuts

note, the gibb screws are 8-32 not 6-32.
I am actually missing one myself so I'll make one this morning. Here's what I would do.

Find a 4-40 nut and a 4-40 screw x 1/2 or longer. Cut the head off, thread the nut on, and mount the screw in the tailstock chuck . Use the chuck to hold the nut while you mount it in the headstock chuck. This ensures that the screw threads are aligned with the spindle. Loosen the tailstock chuck and remove the 4-40 stud. Drill .136" and tap 8-32. The whole operation will only take a few minutes.

Bob
 
I had ordered 6-32 and now await the 8-32 I ordered yesterday. For 5 bucks total, I will have 96 spare #6's and 100 #8's.
 
I had ordered 6-32 and now await the 8-32 I ordered yesterday. For 5 bucks total, I will have 96 spare #6's and 100 #8's.
OK. I finished mine and made three extras to send to you

It took less than a minute each. I change the procedure slightly and just used a 4-40 tap to position the nut. Saved one step that way.

Bob
 
While waiting for the nuts, got the Start/Stop control done. Using a Attiny85 to output PMW to treadmill controller for variable speed, another Attiny85 for Start/Stop, still designing how/where I can get a tach signal for RPM display which will be in between switches and rheostat. Want to read spindle speed directly so no need to convert back gears rpm or worry about belt slippage.
Atlas Lathe.jpg
 
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